I'm trying to get a reliable VPN between Mac (Tiger and Panther), Linux (Ubuntu and Mint) and Windows (from 2000 to Seven)... I used Hamachi before, but its development has stopped (at least for OSX and Linux), and it seems it can't connect for sure anymore.

The new solution should be open-sourced and work with minimal installation efforts, as some distant people aren't sysadmins :)

2. Mmm... Will try that in that order :-- tinc : I surely get a look at it, even if it seems a bit complicated to set up.-- n2n : open-source, maybe complicated to set up (?) http://www.ntop.org/n2n/-- Wippien : Maybe a good choice, but relies on closed-source components.-- SocialVPN : Seems OK, but relies on social web (Facebook, Skype...). I don't like the idea it can stop working tomorrow if Facebook changes the way it works.

3. Last hope :-- OpenVPN : I gave up, as it is a lot too complicated to set up.-- Remobo : Linux & OSX & Windows, and precompiled binaries, but closed-source :(

Thanks Hassan272, but I finally have been convinced to use OpenVPN and managed to set it up.

I was quite afraid to enter into this, as it is known to be quite technical, but it ended up being very simple if you follow the official manual step-by-step (http://www.openvpn.net/index.php/open-source/documentation/howto.html).

This ends my quest for now :)

The only thing I'd like to be added in OpenVPN is a "hamachi-like" graphical user interface that would be a bless for people who don't know/want to get into command line interface.There's an OpenVPN client interface that works pretty well on OSX, it's called TunnelBlick (http://code.google.com/p/tunnelblick).

You should give SocialVPN another look. It now works with XMPP backend such as Google chat, Jabber.org, or ejabberd , no longer relies on Facebook.http://www.socialvpn.org; http://code.google.com/p/socialvpn